Answer:
Succeeding at tennis requires getting a lot of practice on the court is a participal phrase.
Step-by-step explanation:
Participial phrase are the ones which include words that are participle and modifier. Participle are the words formed from an adjective and a verb. Modifiers as the name suggests are the words which modifies a sentence.
Participial phrase usually have an ‘ed’ or ‘ing’ ending. In the sentence, ‘Succeeding at tennis requires getting a lot of practice on the court’ we can see that there’s an verbal phrase which functions as an adjective and that is ‘succeeding.’ This word also acts as a modifier. The sentence is thus a participle phrase.